Blood Flow Restriction During Nordic Hamstring Exercise in Elite Adolescent Athletes

Recruiting now · Not applicable

Conditions studied: Healthy Volunteers (HV)

In brief

This crossover experimental study aims to compare acute hamstring muscle oxygenation responses during Nordic Hamstring Exercise (NHE) and Blood Flow Restriction Nordic Hamstring Exercise (BFR-NHE) in elite adolescent athletes. Participants will complete both exercise conditions in a randomized order separated by a 7-day washout period. Muscle oxygen saturation will be assessed using near-infrared spectroscopy (MOXY), together with total hemoglobin responses, blood lactate concentration, perceived exertion, and exercise performance variables. The findings may improve understanding of the physiological effects of blood flow restriction during eccentric hamstring exercise in adolescent athletes.

Key facts

Study ID

NCT07715786

Run by

Toros University

People needed

24

Starts

2026-07-01

Expected to finish

2027-08-01

Last updated by the study team

2026-07-20

Who can join

Age: 14 and older, up to 18. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Elite adolescent athletes aged 14 to 18 years.
• Licensed athletes with at least 3 years of regular sports participation.
• Currently participating in a regular weekly training program.
• Physically able to complete the Nordic Hamstring Exercise and study testing protocol.
• Willing to participate in the study.
• Able to provide written informed consent.
• For participants younger than 18 years, written informed consent provided by a parent or legal guardian and assent provided by the participant.

You may not qualify if…

• Hamstring injury within the previous 6 months.
• Lower extremity surgery within the previous 6 months.
• Current lower extremity pain or musculoskeletal injury that may interfere with exercise performance.
• Cardiovascular, vascular, neurological, or other medical conditions that may contraindicate blood flow restriction exercise.
• Presence of skin lesions or conditions preventing placement of the blood flow restriction cuff or MOXY sensor.
• Inability to complete either exercise condition or follow the study protocol.

Where it is running

• Adana Olympic Preparation Center — Adana, Turkey (Türkiye) (enrolling)

Full record on ClinicalTrials.gov

Trial information comes from ClinicalTrials.gov and is refreshed daily. TrialsForMe does not provide medical care and does not run the studies it lists.